* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
			
        }

        /* 手机外壳 */
        .phone-shell {
            width: 375px;
            max-width: 100%;
            background: #1a1a1a;
            border-radius: 50px;
            padding: 12px;
            box-shadow: 
                0 20px 60px rgba(0, 0, 0, 0.5),
                inset 0 2px 10px rgba(255, 255, 255, 0.1);
            position: relative;
        }

        .phone-frame {
            background: #000;
            border-radius: 40px;
            overflow: hidden;
            position: relative;
            height: 812px;
            max-height: 90vh;
        }

        /* 侧边按钮 */
        .phone-side-button {
            position: absolute;
            background: #2a2a2a;
            z-index: 10;
        }

        .phone-side-button--mute {
            width: 3px;
            height: 30px;
            left: -3px;
            top: 180px;
            border-radius: 2px 0 0 2px;
        }

        .phone-side-button--volume-up {
            width: 3px;
            height: 45px;
            left: -3px;
            top: 230px;
            border-radius: 2px 0 0 2px;
        }

        .phone-side-button--volume-down {
            width: 3px;
            height: 45px;
            left: -3px;
            top: 285px;
            border-radius: 2px 0 0 2px;
        }

        .phone-side-button--power {
            width: 3px;
            height: 60px;
            right: -3px;
            top: 220px;
            border-radius: 0 2px 2px 0;
        }

        /* 灵岛 */
        .phone-island {
            position: absolute;
            top: 12px;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 35px;
            background: #000;
            border-radius: 20px;
            z-index: 20;
        }

        /* 屏幕内容 */
        .phone-screen {
            background: #fff;
            height: 100%;
            overflow-y: auto;
            overflow-x: hidden;
            position: relative;
        }

        .phone-screen::-webkit-scrollbar {
            display: none;
        }

        /* ========== 问答层样式 ========== */
        #qa-layer {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.95);
        }

        .phone-screen.qa-active .hero,
        .phone-screen.qa-active .section,
        .phone-screen.qa-active .footer {
            visibility: hidden;
        }
        #qa-mask {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            animation: bgScrollUp 20s linear infinite;
            background-size: 100% 200%;
            background-image: url('../img/bg.jpg');
        }

        @keyframes bgScrollUp {
            0% { background-position: 0% 0%; }
            100% { background-position: 0% 100%; }
        }

        #qa-card {
            position: relative;
            background: #fff;
            border-radius: 24px;
            padding: 32px 24px;
            margin: 20px;
            max-width: 400px;
            width: 90%;
            box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
            animation: slideUp 0.4s ease-out;
        }

        @keyframes slideUp {
            from { opacity: 0; transform: translateY(40px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .progress-text {
            text-align: center;
            font-size: 13px;
            color: #999;
            margin-bottom: 8px;
        }

        .progress-bar {
            height: 6px;
            background: #e0e0e0;
            border-radius: 3px;
            overflow: hidden;
            margin-bottom: 24px;
        }

        .progress-bar span {
            display: block;
            height: 100%;
            background: linear-gradient(90deg, #ff4081, #ff6b9d);
            transition: width 0.3s ease;
            border-radius: 3px;
        }

        #qTitle {
            font-size: 22px;
            font-weight: 800;
            color: #1a1a2e;
            margin-bottom: 16px;
            text-align: center;
        }

        #qDesc {
            font-size: 15px;
            color: #555;
            line-height: 1.7;
            margin-bottom: 28px;
            text-align: center;
        }

        /* 文字选项 */
        .options {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .option {
            padding: 16px 24px;
            background: linear-gradient(135deg, #f5f7fa, #e8ecf1);
            border: 2px solid transparent;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 600;
            color: #333;
            cursor: pointer;
            transition: all 0.25s ease;
            text-align: center;
        }

        .option:hover,
        .option:active {
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.25);
            border-color: #667eea;
            background: linear-gradient(135deg, #e8ecf1, #d4dae6);
        }

        /* 图片选项 */
        .img-options {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .img-option {
            aspect-ratio: 1;
            border-radius: 16px;
            overflow: hidden;
            cursor: pointer;
            border: 3px solid transparent;
            transition: all 0.25s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .img-option:hover,
        .img-option:active {
            transform: scale(1.05);
            border-color: #ff4081;
            box-shadow: 0 8px 25px rgba(255, 64, 129, 0.3);
        }

        .img-option img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* 倒计时条 */
        .countdown-bar {
            height: 8px;
            background: #e0e0e0;
            border-radius: 4px;
            overflow: hidden;
            margin-top: 20px;
        }

        .countdown-bar span {
            display: block;
            height: 100%;
            width: 0;
            background: linear-gradient(90deg, #ff4081, #ff6b9d);
            transition: width 2s linear;
            border-radius: 4px;
        }

        /* 弹窗 */
        #popup {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 10000;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.7);
        }

        .popup-box {
            background: #fff;
            border-radius: 20px;
            padding: 36px 28px;
            text-align: center;
            max-width: 320px;
            width: 85%;
            animation: popIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        @keyframes popIn {
            from { opacity: 0; transform: scale(0.8); }
            to { opacity: 1; transform: scale(1); }
        }

        .popup-box h2 {
            color: #ff4444;
            font-size: 20px;
            margin-bottom: 12px;
        }

        .popup-box p {
            color: #666;
            font-size: 15px;
            margin-bottom: 24px;
        }

        .popup-box button {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .popup-box button:hover {
            transform: scale(1.03);
        }

        /* ========== Hero区域 ========== */
        .hero {
            background: linear-gradient(160deg, #fff 60%, #f0f4ff);
            padding: 48px 24px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(255, 64, 129, 0.08) 0%, transparent 50%);
            animation: heroBgFloat 15s ease-in-out infinite;
        }

        @keyframes heroBgFloat {
            0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
            50% { transform: translateY(-30px) rotate(2deg); opacity: 1; }
        }

        .hero img {
            width: 90px;
            height: 90px;
            border-radius: 24px;
            margin-bottom: 20px;
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.25);
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            font-size: 28px;
            font-weight: 900;
            color: #1a1a2e;
            margin-bottom: 12px;
            letter-spacing: 1px;
            position: relative;
            z-index: 1;
        }

        .hero p {
            font-size: 16px;
            color: #666;
            margin-bottom: 28px;
            line-height: 1.6;
            position: relative;
            z-index: 1;
        }

        /* 下载按钮 - 抖动动画 */
        .download-btn {
            display: inline-block;
            padding: 16px 56px;
            background: linear-gradient(135deg, #ff4081, #ff6b9d);
            color: #fff;
            text-decoration: none;
            border-radius: 30px;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 8px 25px rgba(255, 64, 129, 0.4);
            letter-spacing: 1px;
            position: relative;
            z-index: 1;
            animation: btnShake 2s ease-in-out infinite;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        @keyframes btnShake {
            0%, 100% { transform: translateX(0) translateY(0); }
            10% { transform: translateX(-3px) translateY(1px); }
            20% { transform: translateX(3px) translateY(-1px); }
            30% { transform: translateX(-2px) translateY(2px); }
            40% { transform: translateX(2px) translateY(-2px); }
            50% { transform: translateX(-1px) translateY(1px); }
            60% { transform: translateX(1px) translateY(-1px); }
            70% { transform: translateX(0) translateY(0); }
        }

        .download-btn:hover {
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 12px 35px rgba(255, 64, 129, 0.5);
            animation-play-state: paused;
        }

        .download-btn.loading {
            animation-play-state: paused;
            opacity: 0.7;
            cursor: not-allowed;
        }

        /* ========== 功能区块 ========== */
        .section {
            padding: 36px 24px;
            background: #fff;
        }

        .section:nth-child(even) {
            background: #fafbfc;
        }

        .section h2 {
            font-size: 22px;
            font-weight: 800;
            color: #1a1a2e;
            margin-bottom: 24px;
            text-align: center;
        }

        .features {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px;
            background: linear-gradient(135deg, #f8f9ff, #fff);
            border-radius: 16px;
            border: 1px solid #eef0f5;
        }

        .feature svg {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            fill: #ff4081;
        }

        .feature h3 {
            font-size: 17px;
            font-weight: 700;
            color: #1a1a2e;
            margin-bottom: 6px;
        }

        .feature p {
            font-size: 14px;
            color: #777;
            line-height: 1.5;
        }

        /* ========== 截图滚动区（自动轮播）========== */
        .screenshots-wrapper {
            position: relative;
            overflow: hidden;
            padding: 8px 0;
        }

        .screenshots {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding: 8px 0;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .screenshots::-webkit-scrollbar {
            display: none;
        }

        .screenshots img {
            width: 220px;
            height: 380px;
            object-fit: cover;
            border-radius: 16px;
            flex-shrink: 0;
            scroll-snap-align: start;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
            transition: transform 0.3s ease;
        }

        .screenshots img:hover {
            transform: scale(1.05);
        }

        /* ========== 用户评价 ========== */
        .reviews {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .review-item {
            background: linear-gradient(135deg, #fff9f5, #fff);
            padding: 18px 20px;
            border-radius: 14px;
            border-left: 4px solid #ff4081;
            box-shadow: 0 3px 12px rgba(0, 0, 0, 0.05);
        }

        .review-item b {
            display: block;
            font-size: 16px;
            color: #1a1a2e;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .review-item p {
            font-size: 14px;
            color: #555;
            line-height: 1.65;
        }

        /* ========== 应用信息 ========== */
        .info-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .info-list li {
            display: flex;
            justify-content: space-between;
            padding: 14px 18px;
            background: #f8f9fb;
            border-radius: 10px;
            font-size: 14px;
        }

        .info-list li span:first-child {
            color: #888;
            font-weight: 500;
        }

        .info-list li span:last-child {
            color: #1a1a2e;
            font-weight: 600;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: linear-gradient(135deg, #1a1a2e, #2d2d44);
            color: #aaa;
            text-align: center;
            padding: 28px 20px;
            font-size: 13px;
            letter-spacing: 0.5px;
        }

        /* ========== 微信蒙层 ========== */
        #wechat-mask {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 99998;
            background: rgba(0, 0, 0, 0.92);
        }

        .wechat-mask-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
        }

        .wechat-mask-pop {
            position: relative;
            background: #fff;
            border-radius: 20px;
            margin: 40px auto;
            max-width: 340px;
            width: 88%;
            padding: 28px 24px;
            animation: popIn 0.35s ease-out;
        }

        .wechat-mask-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 24px;
            padding-bottom: 18px;
            border-bottom: 2px solid #f0f0f0;
        }

        .wechat-mask-logo {
            width: 52px;
            height: 52px;
            border-radius: 14px;
        }

        .wechat-mask-title {
            font-size: 17px;
            font-weight: 700;
            color: #1a1a2e;
            margin-bottom: 4px;
        }

        .wechat-mask-subtitle {
            font-size: 13px;
            color: #888;
        }

        .wechat-mask-steps {
            margin-bottom: 20px;
        }

        .wechat-mask-steps p {
            font-size: 14px;
            color: #333;
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .step-num {
            display: inline-block;
            width: 22px;
            height: 22px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
            border-radius: 50%;
            text-align: center;
            line-height: 22px;
            font-size: 12px;
            font-weight: 700;
            margin-right: 8px;
        }

        .wechat-mask-divider {
            text-align: center;
            position: relative;
            margin: 20px 0;
            color: #999;
            font-size: 13px;
        }

        .wechat-mask-divider::before,
        .wechat-mask-divider::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 38%;
            height: 1px;
            background: #ddd;
        }

        .wechat-mask-divider::before { left: 0; }
        .wechat-mask-divider::after { right: 0; }

        .wechat-mask-copy {
            display: flex;
            gap: 10px;
        }

        .wechat-mask-copy input {
            flex: 1;
            padding: 12px 14px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 13px;
            background: #f8f9fb;
        }

        .wechat-mask-copy button {
            padding: 12px 20px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
        }

        /* 网络错误弹窗 */
        #net-modal {
            display: none !important;
        }

        /* ========== 响应式优化 ========== */
        @media (max-width: 420px) {
            body { padding: 0; }
            .phone-shell {
                border-radius: 0;
                padding: 0;
                box-shadow: none;
            }
            .phone-frame {
                border-radius: 0;
                height: 100vh;
                max-height: none;
            }
            .phone-side-button { display: none; }
            .phone-island { display: none; }
        }

        /* ========== 动画效果 ========== */
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }